Three years ago, < a href="http://www.selfridges.com/GB/en/cat/questyle/" style="text-decoration: none"><font color="black"><b>Questyle</b></a></font> sparked upon a plan to design a high-resolution <b>portable music player</b> (DAP). For its first DAP, they set themselves an almost impossible goal. That was, to make it possible, for true music lovers and professional audiophiles, to enjoy the same Hi-Fi listening experience achieved in state of the art home based systems, in a portable body. This means, the circuit design, the device, the system architecture, as well as, the industrial design and processes, must all be reconsidered. The brand looked forward to it, as not just portable Hi-Fi equipment, but, as the future of Hi-Fi itself.